Consider the following loan categories:

Loan Type	Singapore Banks Total ($b)	Bank A ($b)	Bank B ($b)	Bank C ($b)	Bank D ($b) *
Real Estate	1900	21	20	10
Commercial	5100	171	24	12
Industrial	1600	42	20	10
Consumer	1400	18	16	8
Travel and Hospitality	1500	20	10	5
Other	2500	48	20	10

* Bank D is only investing in short-term government securities.

Which bank has the most diversified portfolio? Show all calculations.